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A car sounding its horn at 480Hz moves t...

A car sounding its horn at `480Hz` moves towards a high wall at a speed of `20ms^(-1)`, the frequency of the reflected sound heard by the man sitting in the car will be nearest to , (speed of sound `=330m//s)`

A

480 Hz

B

510 Hz

C

540 Hz

D

570 Hz

Text Solution

Verified by Experts

The correct Answer is:
C
`n' = n [(v + v_(0))/(v - v_(s))]`
`= 480 [(340 + 20)/(340 - 20)] = 480 [(360)/(320)] = (30 xx 36)/(2)`
= 504 Hz
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